The new Cipher units arrive with some new weapons (all names and descriptions translated through Google Translate):
Apprentice Tenshi's Spear: The spear that Emma has since long ago
Capricious Spear: Lance's (Randal) favorite spear
Warrior's Sword: Yuzu uses a solid and healthy sword.
Shade did not come with a weapon or item.
Here is an album of the Forge levels for the new items:

Looks like the folks at Datel have figured out how to add items to Alm or Celica's Convoy. Tried out their Powersaves codes, and I was able to add (no need to replace) Astra, Luna, and Sol to Alm's convoy. As soon as I booted the game, received the Mystery Relics award.

Maybe there was a bug when you downloaded the DLC and the game was writing the Support Conversations to the Extra Data. Might be best to delete the Extra Data and reload the Deliverance DLCs, then check and see if the voices are there.

Eh, not too different from her Princess outfit. Can be argued that it covers more than her Princess outfit.
Also, Triangle Attack has an extra animation with the Harrier Overclass (unless the added fire is due to me using Gradivus):